Identification and use of a wild plant with antimicrobial activity against Ralstonia solanacearum, the cause of bacterial wilt of potato |
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| Authors: | ATSUSHI OOSHIRO KAZUKO TAKAESU MASAHIRO NATSUME SATOSHI TABA Kanami Nasu MIKA UEHARA YORITOMO MURAMOTO |
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| Institution: | Okinawa Prefectural Agricultural Experiment Station, Sakiyama, Naha, Okinawa,; Department of Applied Biological Science, Tokyo University of Agriculture and Technology, Saiwai, Fuchu, Tokyo,; Department of Tropical Crop Science Faculty of Agriculture, University of the Ryukyus, Senbaru, Nishihara, Okinawa and; Okinawa Prefecture Public Fisheries Corporation, Oohama, Motobu, Okinawa, Japan |
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| Abstract: | Fresh aerial tissue and roots of 14 wild plants in Okinawa prefecture were investigated for their antimicrobial activity against Ralstonia solanacearum , which causes bacterial wilt of potato. A 70% aqueous ethanol extract of fresh aerial tissue of Geranium carolinianum L. showed strong antimicrobial activity against R. solanacearum . This extract also showed antimicrobial activity against the pathogens causing common scab of potato and soil rot of sweet potato. The antimicrobial substance could be extracted with hot water, and was effective against R. solanacearum in soil. In the field test, a treatment combining incorporation of dried aerial tissue into the soil and solarization was highly effective for control of bacterial wilt of potato. These findings suggest that G. carolinianum L. could be used as a biological agent for the control of bacterial wilt of potato. |
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| Keywords: | bacterial wilt of potato Geranium carolinianum L Ralstonia solanacearum |
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